Footwear sole



FIG. 1 is a bottom plan view of a footwear sole showing my new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is an elevation of a side opposite that shown in FIG. 2;

FIG. 4 is a front elevation thereof; and,

FIG. 5 is a rear elevation of the same. 

The ornamental design for a footwear sole, as shown and described. 